word of warning, if you are going to get busy with the RW45, make sure you get protective goggles and dsposable suits with a hud (they sell them in most DIY places)
I spent 2 weeks up to my neck in RW45 and didnt get even the slightest itch wearing all that.
A mate of mine did his studio around the same time and just went in with a T-Shirt, he was itching for 2 weeks!